This mod lets you do three things: add or remove items from any chest type (including nether fortress chests and any custom chests added by mods or custom chests you add in the config), add or remove drops from entities, and add new records. The instructions for each are in the config files.
It also generates a set of useful files showing you info about items, blocks, entities, effects, enchantments, dimensions, and foods.
Those info files and all the config files (except the records.cfg file) will only generate once you load a world (any world). This is because some of the item IDs don’t load correctly until the game starts.
The instructions for each specific function of the mod are in the config files, but here is some general info:
This mod comes with a few extra records already added (using the default minecraft music). You will have to also download and install the resource pack (here: http://www.curse.com/texture-packs/minecraft/225881-loot-custom-records) if you want the records to play (otherwise they won’t play!), and then you can also add your own records. If you don’t want to use the record portion of this mod, you don’t have to install the resource pack; instead go into the records.cfg file and remove all the entries in it.
There are also chests for each loot type in the creative inventory which will generate their contents when placed (for testing purposes, but they could also make good rewards for things like adventure maps =) ). Note you can add custom chest types and their contents in the config, and each category will show up in the menu.
Note that for the NBT tags, you can use string IDs for the items and blocks (unlike the 1.7.10 /give and /summon commands) because I created my own parser for the NBT data.
Download Loot++ Mod